lewis will be october's guest. kitty kelley on november 3, december 1 christian hoff sommers and on january 5, mark levine. >> george gilder sat down with booktv at freedomfest in las vegas to discuss his most recent book, tranfourteen, which he describes his latest thinking on how capitalism produces wealth and benefits society. it starts now on booktv. >> you are washing booktv on c-span2 but were on the location in las vegas at freedomfest which is a gathering of libertarians. and joining us now is a best selling author and economist george gilder. whose most recent book is "knowledge and power: the information of capitalism and how it is revolutionizing our world." how many books have you now written. >> guest: about 17 or something like that. >> host: how is this one different from your previous book? >> guest: this one sums up all my books. ..